Question 1

Which of the following is NOT a factor that limits prokaryotic growth?

Accepted Answer

Presence of membrane-bound organelles

Question 2

What is the term for the community of prokaryotes living in or on your body that are often mutualistic?

Accepted Answer

Microbiome

Question 3

When a prokaryote uptakes DNA from the environment, what is this process called?

Accepted Answer

Transformation

Question 4

Which of the following is a characteristic unique to prokaryotes compared to eukaryotes?

Accepted Answer

Circular DNA not enclosed in a nuclear envelope

Question 5

Archaea are often described as 'extremophiles.' What does this mean?

Accepted Answer

They thrive in harsh conditions such as high acidity or temperature

Question 6

Which metabolic strategy is used by organisms that obtain energy from inorganic molecules and carbon from CO$_2$?

Accepted Answer

Chemoautotrophy

Question 7

A bacterium that can use oxygen for respiration but is not poisoned by its absence is classified as:

Accepted Answer

Facultative anaerobe

Question 8

Which process involves the transfer of genetic material between two prokaryotic cells via direct contact?

Accepted Answer

Conjugation

Question 9

Why are Gram-positive bacteria generally more susceptible to penicillin than Gram-negative bacteria?

Accepted Answer

They have a thick peptidoglycan layer that penicillin targets

Question 10

Which of the following best describes the role of plasmids in prokaryotes?

Accepted Answer

They often carry antibiotic resistance genes and can be transferred between cells

Question 11

A scientist discovers a prokaryote that thrives in boiling hot springs and has a cell wall lacking peptidoglycan. To which domain does this organism most likely belong?

Accepted Answer

Archaea

Question 12

Which of the following statements about the microbiome is TRUE?

Accepted Answer

It can influence digestion, vitamin production, and mood regulation

Question 13

Koch's postulates are important in microbiology because they:

Accepted Answer

Establish a rule to demonstrate a causal relationship between a microbe and a disease

Question 14

Which of the following is a consequence of overusing antibiotics?

Accepted Answer

Increase in autoimmune disorders due to loss of good species

Question 15

Which equation best represents the exponential growth of prokaryotes under ideal conditions?

Accepted Answer

$N_t = N_0 e^{rt}$

Question 16

Which of the following is NOT a recommended practice for antibiotic use?

Accepted Answer

Share leftover antibiotics with family members

Question 17

Which of the following statements about prokaryotic cell walls is correct?

Accepted Answer

Bacterial cell walls contain peptidoglycan, while archaea contain other compounds

Question 18

Which of the following is an example of mutualism involving prokaryotes?

Accepted Answer

Bacteria in the gut aiding digestion

Question 19

Which process allows bacteria to rapidly adapt to environmental changes by acquiring new genetic material?

Accepted Answer

Horizontal gene transfer

Question 20

A Gram-negative bacterium is less susceptible to penicillin because:

Accepted Answer

It has an outer membrane that blocks penicillin

Prokaryotes: Structure, Function, and Interactions

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